JP3293814B2 - Nail polish brush and nail polish application device provided with the brush - Google Patents

Abstract

The bristles of brushes used for applying water-based make-up and cosmetic care products are impregnated on the surface with a partially acetylated polyvinylalcohol polymer. A brush for applying make-up and cosmetic care preparations comprises a tuft of sensibly parallel bristles with one end of the bristles being fixed to the free end (4a) of a stem, the bristles of the tuft being impregnated on the surface with a partially acetylated polyvinylalcohol comprising at least units of formula (I) and (II) in which the units (II) are present in proportions of 3-40 mole % on total polymer, and the polyvinylalcohol polymer has an average mol. wt. of 10,000 - 190,000 (10,000-120,000) (31,000-50,000).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to a nail varnish or nail care of the type comprising bristles arranged in tufts substantially parallel to one another and fixed to a support called a brush wand. A brush for applying a makeup or beauty product, such as a product, a liquid lipstick product or a liquid foundation.

[0002]

BACKGROUND OF THE INVENTION Nail polish is generally removed from a container having a stopper and a neck integrated with an application brush dipping a nail polish product contained in the container in a storage position. In an application device.

[0003] For proper application of the nail polish, it is important that the bristles of the brush are uniform in order to deposit a uniform layer of nail polish on the nail. However, during transportation and storage of the brush, the tufts of bristles may be deformed before being housed in the container containing the nail polish product. For example, one or more bristles of a tuft may bend, then the bristles may spread and no longer form a uniform tuft.
Such deformed tufts prevent the product from being applied uniformly to the nails; moreover, such brushes are difficult to insert through the neck of the container, and thus are industrial methods of containing nail polish Hinders proper implementation.

To avoid bristle tuft deformation, it is possible to treat the bristle tufts before they are contained in a container by immersing them in a solution of a film-forming polymer called a reinforcing solution. After drying, a coating of the film-forming polymer is formed on the bristle surface, protecting the bristles from deformation or spreading and thus reinforcing the bristles.

[0005] The reinforcing solution must be sufficiently liquid to allow the bristle tufts to rapidly infiltrate. The solution must be able to infiltrate by sufficient tuft capillary effect to ensure proper retention of the tuft. After being deposited in the tuft, the solution must dry quickly to leave a non-tacky, non-friable, soft and brittle polymer coating in the tuft. The polymer coating must be capable of rapidly dissolving when the tuft is immersed in the nail polish product without interfering or destabilizing the cosmetic properties of the product.

[0006] Nitrocellulose is one of the most commonly used film-forming polymers in nail polish in organic solvents. For such nail polish, the reinforcing solution is a solution of nitrocellulose and a plasticizer. For example, as described in EP-A-648485, nail varnishes in aqueous media containing particles of the film-forming polymer dispersed in the aqueous media are also known, and in these products, dispersed particulate Of the film-forming polymers are insoluble in water. For treating brushes intended to apply a water-based nail polish, it is possible to use an aqueous solution containing a water-soluble polymer as a reinforcing solution. This water-soluble polymer has different properties than the water-insoluble film-forming polymer present in nail varnish products. Unlike nail polish in solvents containing nitrocellulose, it is difficult to treat brush tufts with the same film-forming polymer present in nail polish products.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a reinforced brush suitable for applying nail polish in an aqueous medium.

Surprisingly, the Applicant has found that such a brush is obtained by reinforcing the bristle tufts with certain polyvinyl alcohols. This polymer is easily dissolved in water, making it possible to obtain a free flowing aqueous solution which allows the tufts to be rapidly infiltrated. The aqueous solution deposited on the tufts dries quickly, is non-sticky, and leaves a brittle, friable coating on the bristles. The bristles thus treated, while not spreading, remain sufficiently flexible to form a uniform tuft even after being constrained to transport and store the brush before being housed.
Furthermore, after the brush is attached to the nail polish container, the polymer coating rapidly dissolves in the nail polish product containing water without altering the cosmetic properties of the nail polish or destabilizing the product.

In particular, the subject of the present invention comprises tufts of bristle ,
A brush for applying a make-up or beauty product, wherein one end of these bristles is fixed to the free end of a rod, wherein the bristles of the tufts partially comprise at least the units of the formulas (I) and (II) Polyvinyl alcohol acetylated to:

Embedded image [Wherein the unit of the formula (II) is 3 mol based on the polymer.
% Of the polyvinyl alcohol having a weight average molecular weight in the range of 10,000 to 19,000].

[0010] The subject of the present invention is also a method for coating the bristles of a brush tuft , including a tuft of bristle, one end of which is fixed to the free end of a bar, for applying a make-up product, Contacting at least a portion of the bristle tufts with the aqueous composition comprising polyvinyl alcohol, and then removing the bristle tufts from the composition and drying.

The subject of the present invention is also a brush for applying a make-up product obtained according to the method described above.

It is also an object of the present invention to provide a container having a stopper and a neck integral with the brush submerged in a nail polish or a nail varnish containing an aqueous medium contained in the container in a storage position. It is also a device for applying nail polish or nail care products.

The subject of the present invention is also a nail varnish or nail in a storage position, comprising a container with a stopper and a neck integrated with a brush immersed in a nail varnish or nail care product contained in the container. An apparatus for applying a care product, wherein the product comprises an aqueous medium containing at least one of the above-mentioned polyvinyl alcohols.

[0014] The polyvinyl alcohol used according to the present invention may be used in an amount of 10,000 to 190,000, preferably 1000, in order to obtain a stiffening solution with sufficient fluidity to be able to soak the bristle tufts of the brush by the capillary effect.
It has a weight average molecular weight in the range of 0 to 120,000, more preferably 31,000 to 50,000.

Advantageously, the units of the formula (II) are from 10 to 15
It can be present in polyvinyl alcohol at a ratio in the range of mol%.

In a preferred embodiment of the present invention, the polyvinyl alcohol comprises units of the formulas (I) and (II).

The polyvinyl alcohols which can be used in accordance with the present invention include the trade names "AIRVOL 203", "AIRVOL 205", "AIRVOL 6" from Air Products Chemical Company.
108 ”,“ AIRVOL 523 ”and“ AIRVOL 540 ”, Rhone-P
oulenc “RHODOVIOL 4/125”, “RHODOVIOL 14/13
5 "and" RHODOVIOL 25/140 ", Hoechst's" MOWIOL
4-88 "," MOWIOL 40-88 "and" MOWIOL 18-88 ", and DuPont's" ELVANOL 51-05 "and" ELVANOL 52-
22 ".

The bristles of the tuft are made of polyamide, polyester,
Polyether-block-amide, polyethylene, polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl chloride, viscose, rayon, polyacetal,
It can be composed of a material selected from natural silk or mixtures thereof.

The bristles making up the brush can preferably have a cross section inscribed in a circle (Φ) with a diameter in the range of 4/100 to 40/100 of a millimeter, for example.

According to another embodiment of the invention, the tufts may comprise a mixture of bristles of small cross section or fine bristles and bristles of large cross section or coarse bristles, the ratio of coarse bristles being Is 2 for the total amount of brush tufts
% To 95%, preferably 10% to 90%. In particular, thin bristles can have an inscribed cross-section in the range of 4/100 to 10/100 of a millimeter, while thick bristles can have an inscribed cross-section of 11/1 of a millimeter.
It may have an inscribed cross section in the range of 00 to 40/100.

The bristle tufts of the brush can have a length of 5 to 25 mm, preferably 13 to 20 mm.

According to an advantageous aspect of the invention, the bristles can have one end obtained by bending a bundle of fibers into a U-shape, the bottom of the U-shape being formed by the push-in fasteners of the brush rod. It can be held in a housing formed at the free end. Advantageously, the housing is a cylinder of
revolution). Also oval, elongated,
Alternatively, it may have a cross shape, or a semicircular tile shape. The receptacle may project toward the free end of the bar. Bristle tufts may also be secured to the receptacle by gluing or by other means commonly used in the manufacture of brushes, such as ferrules.

The number of bristles forming a tuft can advantageously range from 100 to 600.

The material constituting the bristles modifies the surface condition and / or the sliding properties and / or the water and / or water
Alternatively, an agent for reducing wettability to a solvent contained in a makeup product such as a nail polish or an antistatic agent can be advantageously contained.

Advantageously, agents which improve the sliding properties of the bristles and reduce their wettability to water can be incorporated into the bristle material in amounts ranging from 0.2 to 15% by weight.

The slip agent is polytetrafluoroethylene,
Boron nitride, molybdenum disulfide, graphite,
It can be selected from the group formed from silicones, fullerines and talc.

Advantageously, at least some of the bristles may be slightly wavy in the longitudinal direction. The bristles have a cross-section of a shape selected from the group of circles, annular polygons, crosses, rectangles, multilobes, U, C and V types, and have a shape having at least one capillary groove. be able to.

The free ends of the bristles constituting the brush may be formed in the shape of a pin head obtained by a heat treatment such as, for example, flame brushing. Also, the free ends of the bristles can be tapered, such tapers being obtained, for example, by grinding or carding.

The cross section of the brush can have various shapes, in particular the tufts can have a circular cross section, a semicircular tile or oval cross section or a cruciform cross section. Further, the bristles can have different lengths. In particular,
The free end of the brush may be flat or rounded.

[0030] Brushes which can be used according to the invention are described in particular in EP-A-556081, EP-A-581922, EP-A-651955 and EP-A-676612. The contents thereof are incorporated herein by reference.

To obtain the brush according to the invention, at least part or all of the bristles of the brush are brought into contact with the aqueous composition comprising polyvinyl alcohol. Advantageously, half the length of the tuft of bristles is immersed in the composition; the ends of the tufts can be contacted with the composition for a time sufficient for the tuft to be infiltrated by the capillary effect. The contact time may be relatively short, in particular less than 5 seconds; an instant dipping operation may also be performed.

Since the polyvinyl alcohol is completely soluble in water, the aqueous composition used in the process according to the invention, the so-called reinforcing solution, is present in the form of an aqueous solution of the polyvinyl alcohol.

In order to be able to obtain a very fluid solution which helps a good infiltration of the bristle tufts,
Polyvinyl alcohol is present in an amount of 0.1% based on the total weight of the composition.
It may be present in the composition in an amount ranging from 1 to 10% by weight, preferably 0.5 to 5% by weight.

After infiltration of the brush, the brush is removed from the reinforcing solution and dried until the polymer coating deposited on the bristles is dry. Drying can be performed in ambient air or using a heat source or blower (blower).

In order to reduce the drying time of the reinforcing solution after infiltrating the tuft, the reinforcing solution may further comprise at least one C ₂ -C ₅ lower alcohol, in particular ethanol. The content of lower alcohol in the composition,
It can range from 0 to 80% by weight, preferably 40 to 70% by weight, based on the total weight of the composition.

The reinforcing solution further reduces the surface tension of the solution and promotes good infiltration of the bristles of the brush,
A wetting agent may be further included. As a wetting agent, for example, dimethicone copolyol can be used.
The wetting agent can be present in particular in an amount ranging from 0.1 to 15% by weight, preferably from 0.5 to 5% by weight, based on the total weight of the polyvinyl alcohol.

Dimethicone copolyol has the general formula (II)
Compounds of I):

Embedded image Wherein -R ₁ may be the same or different and represents a hydrogen atom, a linear or branched C ₁ -C ₃₀ alkyl group or a phenyl group; -R ₂ may be the same or different ,-(C _x H _2x )-
Represents (OC ₂ H ₄ ) ₈ — (OC ₃ H ₆ ) _b —OR ₃ ; —R ₃ may be the same or different and is a hydrogen atom, a linear or branched containing 1 to 12 carbon atoms Alkyl group,
And is selected from linear or branched acyl groups having 2 to 12 carbon atoms; -n ranges from 0 to 1000; -p ranges from 1 to 30; -B ranges from 0 to 50; -a + b is 1 or more; -x ranges from 1 to 5; -Number average molecular weight is 15000 or more. And preferably in the range of 25,000 to 75,000].

Preferably, the following conditions: -R ₁ represents a methyl group; -R ₃ represents a hydrogen atom, a methyl group or an acetyl group, preferably a hydrogen atom; -A is in the range 5 to 40, preferably 15 to 30; -b is in the range 5 to 40, preferably 15 to 30; -x is 2 or -N ranges from 20 to 600, preferably 50 to 5
And more preferably in the range of 100 to 300;
The oxyalkylenated silicones of I) are used.

[0039] Such silicones are described, for example, in US Patent No. 4,311,695, which is incorporated by reference.

Dimethicone copolyol is especially useful in 199
At the 17th International Conference on IFSCC in October 2009,
Presented by Dow Corning and presented by Linda Madore et al.
ater-soluble dimethicone copolyol waxes for the pe
rsonal care industry ", pages 1-3.

These dimethicone copolyols are polydimethylsiloxanes (PDMS) containing one or more water-soluble ether functions (oxyalkylenes, especially oxyethylene and / or oxypropylene).

The dimethicone copolyol is ABIL
It is commercially available from Goldschmidt under the name B8851 or ABIL B88183. Also mention may be made of compounds KF 351 to 354 and KF 615A which are commercially available from Shin-Etsu or DMC 6038 from Wacker.

The dimethicone copolyol derivative which can be used is, in particular, a dimethicone copolyol having a phosphate group, a sulfate group, a polydimethylammonium myristamide chloride group, a stearic acid group, and an amine group, which has been modified with sugar. Can be. As dimethicone copolyol derivatives, especially Silphos A100, Siltech ami from Siltech
ne 65, Silwax WDIS, myristamide silicone quat
Compounds marketed under the name (quat) or Phoeni
A compound commercially available from Company x under the name Pecosil PS 100 can be used.

A derivative commercially available from Wacker under the name VP 1661 or 2501 Cosmetic W from Dow Corning
Derivatives marketed under the name ax can also be used.

The most preferred silicones are, for example, Dow
One is commercially available from Corning under the name Q2-5220, and the other is commercially available from Rhone-Poulenc under the name MIRASIL DMCO.

The brush according to the invention is particularly suitable for accommodating and applying nail polish or nail care products containing an aqueous medium. An apparatus for applying nail polish or nail care includes a container having a stopper and a neck integrated with the brush, wherein the brush comprises an aqueous solvent contained in the container in a storage position. I am immersed in.

After the brush is attached to the container, the polyvinyl alcohol present on the surface of the bristles of the brush readily dissolves in aqueous nail varnish or nail care products. Therefore, the product contained in the application device contains the dissolved polyvinyl alcohol in an aqueous medium in an amount ranging from 0.005 to 0.5% by weight relative to the total weight of the product.

[0048] Cosmetic nail varnishes or nail care products generally comprise at least one water-insoluble film-forming polymer in particulate form dispersed in an aqueous medium. Because the film-forming polymer is insoluble in water, it has different chemistry than the water-soluble polyvinyl alcohol used to treat the brush.

As a film-forming polymer, in a known manner,
It is possible to use synthetic, radical or polycondensation polymers, polymers of natural origin, and mixtures thereof.

The expression "radical film-forming polymer" is to be understood as meaning polymers obtained by the polymerization of unsaturated, in particular ethylenically unsaturated, monomers, in which each monomer is homopolymerized. (Different from the copolymer product).

The radical type film forming polymer may be a vinyl polymer or a copolymer, such as an acrylic polymer.

The vinyl film-forming polymer can result from the polymerization of monomers having ethylenic unsaturation having at least one acidic group and / or esters of these acidic monomers and / or amides of these acidic monomers.

As the monomer having an acidic group, α, β-ethylenically unsaturated carboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, maleic acid and itaconic acid can be used.

The esters of the acidic monomers are, in particular, C ₁ -C
Alkyl acrylates (methacrylates) such as ₂₀ alkyl, especially aryl acrylates (methacrylates) such as C ₆ -C ₁₀ aryl, and especially hydroxyalkyl acrylates (methacrylates) such as C ₂ -C ₆ hydroxyalkyl. And esters of acrylic (methacrylic) acid (so-called acrylates (methacrylates)).

Examples of the amide of the acidic monomer include:
Particularly, acryl (methacryl) amides such as N-alkyl and C ₂ -C ₁₂ alkyl acryl (methacryl) amide can be mentioned.

The film-forming vinyl polymer can also be obtained from homopolymerization or copolymerization of monomers selected from vinyl esters and styrene monomers. In particular, these monomers can be polymerized with the acidic monomers and / or their esters and / or their amides as described above.

Examples of vinyl esters include vinyl acetate, vinyl neodecanoate, vinyl pivalate,
Mention may be made of vinyl benzoate and vinyl t-butyl benzoate.

Styrene monomers include styrene and alpha-methylstyrene.

The list of predetermined monomers is not exhaustive, and any monomer within the category of acrylic and vinyl monomers well known to those skilled in the art, including monomers modified by silicone chains, can be used.

The radical polymers used in nail varnishes or nail care products are disclosed in US Pat.
No. 3, International Patent Application No. 97/42930 and French Patent Application No. 2755509.

Among the polymerization products which can be used as film-forming polymers, anionic, cationic, nonionic or amphoteric polyurethanes, acrylic polyurethanes, polyvinylpyrrolidone-polyurethanes, polyester-polyurethanes, polyether-polyurethanes, polyureas, polyureas -
Polyurethanes, and mixtures thereof. Polyurethanes which can be used are described in particular in EP-A-680742.

Among the polycondensation products which can be used as film-forming polymers, mention may also be made of polyesters, polyesteramides, polyesters with fatty chains, polyamides and epoxy ester resins. The polyesters which can be used are, in particular, those described in U.S. Pat.
No. 3 or Eastman Chemic
It is commercially available from Al Inc. under the trade name Eastman AQ ™.

The optionally modified, naturally occurring polymers can be selected from shellac resins, sandalack gums, dammers, elemi gums, copals, water-insoluble cellulose polymers and mixtures thereof. Such polymers are described in particular in EP-A-676451.

[0064] Dispersions containing one or more film-forming polymers may be prepared by those skilled in the art based on general knowledge.

The size of the polymer particles in the aqueous dispersion is
In the range of 10 to 500 nm, preferably 20 to 300
nm.

The polymer in the aqueous dispersion may be present in the nail polish or nail care product in an amount of from 1 to 50% by weight, preferably 5% by weight of the dry matter of the film-forming polymer, relative to the total weight of the product
To 45% by weight.

The nail varnish or nail care product can contain plasticizers and / or coalescing agents well known to those skilled in the art.

The present invention departs from the above arrangement and comprises a number of other arrangements which are more fully described below with respect to the completely non-limiting exemplary embodiments described with reference to the accompanying drawings.

FIG. 1 shows that the rod 4 is fixed to one end 4a of the rod 4 and
1 shows a brush 1 for applying nail polish with a tuft 2 of bristles 3 arranged in the axial direction of a rod . A cylindrical sleeve 5 is fixedly attached to the end of the bar 4 opposite the tuft 2 and this end is attached to the sleeve.
This cylindrical sleeve 5 acts as a member for handling the brush and also as a stopper intended to be screwed, for example, to the neck of a nail polish bottle.
The tuft 2 is obtained from a bundle of bristles folded in half at a longitudinal midpoint . The tuft 2 is attached to the end of the rod 4 by attaching the folded part of the bristle tuft to a receiving part (not shown in FIG. 1) formed by a coupling hole opening at the end 4a of the rod 4. 4a is fixed in a known manner. For a detailed description of fixing a tuft of bristles to a rod, reference may be made to EP-A-651955 and EP-A-736612, the contents of which are incorporated herein by reference.

FIG. 2 shows a nail polish device 6 including the brush 1 of FIG. 1 fastened to the neck 7 of a bottle 8 containing a nail polish product 9 containing water. The bristle tuft 2 is immersed in the product 9. Product 9 comprises a polyvinyl alcohol according to the present invention dissolved in an aqueous solvent and further comprises a water-insoluble film-forming polymer in the form of particles dispersed in the aqueous solvent.

Examples of brushing according to the method of the present invention and comparative examples performed using a method that does not form part of the present invention are described below.

[0072]

EXAMPLES Example 1 A reinforcing solution S1 was prepared using the following composition. Solution 1:-Partially acetylated polyvinyl alcohol (AIRVOL 205 from Air Product Chemical) 1.5 g-Ethyl alcohol 66 g-Total water to 100 g

A brush having the following characteristics was treated with the above solution. Length of exposed portion of bristles: 18 mm 90% cylindrical bristles made of nylon-11 (RILSAN), 15/100 mm, addition of 5% molybdenum disulfide, about 110 bristles; nylon-6,12 (TYNEX nylon) ) 10% cylindrical bristles, 8/100 mm, about 46 bristles.

A bunch of brushes was soaked halfway into the solution for 1 second.

The brush was taken out and dried in the air. After drying, the polyvinyl alcohol coating the surface of the bristles was not tacky and gave the bristles good flexibility while maintaining a uniform tuft.

When the brush is immersed in an aqueous nail polish product, for example the same as in the example of EP-A-648485, the polymer on the surface of the bristles dissolves easily in the aqueous medium and the cosmetic properties of the nail polish Did not change. A uniform tuft of brush allowed a uniform layer of nail polish to be applied to the nail.

The brush of Example 1 was attached to a bottle containing the following nail polish product. -Aqueous polyester-polyurethane dispersion with 35% solids (Goodrich AVALURE UR 405) 25 g MA-Acetyl tributyl citrate 2.5 g-Ethanol 5 g-Clay 1 g-Pigment 3 g-Preservatives qs-100 g of total water And the amount

After dipping the brush tress into the nail polish product, the polyvinyl alcohol was completely dissolved in the nail polish. The nail polish product maintained its cosmetic properties without being destabilized.

Example 2 The same method as in Example 1 was carried out using the following reinforcing solution 2. Solution 2:-Partially acetylated polyvinyl alcohol (AIRVOL 540 from Air Product Chemical) 1.7 g-Ethanol 50 g-Total water to 100 g

After dipping the brush tufts in the nail polish product, the polyvinyl alcohol was completely dissolved in the nail polish. The cosmetic properties were maintained without destabilization.

Comparative Examples 3 and 4: Two reinforcing solutions which do not form part of the invention having the following compositions were prepared. Solution 3:-2.5 g sodium polymethacrylate (DARVAN 7 from Vanderbilt)-20 g ethanol-100 g of water in total Solution 4:-0.67 g hydroxypropyl methylcellulose (METHOCEL E4 MUG from Dow Chemical)- Ethanol 66.6g-amount of water to make 100g

For each solution, a brush having the same properties as in Example 1 was treated by immersing it half way into the solution for 1 second.

The treatment with solution 3 did not rapidly dry the impregnated bristle tufts, since the tufts were not dry even after 30 minutes. This extremely long drying time is not suitable for industrial practice of brush treatment.

Solution 4 formed a hard film after impregnation and drying. In addition, the coating may have low contact (eg,
The tuft was twisted easily), the bristle was not reinforced, and the tuft was easily deformable.

Only the brushes treated with the examples 1 or 2 according to the present invention provide good reinforcement of the tufts and the use of polyvinyl alcohol in aqueous nail polish products without impairing the stability or the cosmetic properties of the nail polish. Appropriate dissolution was made achievable.

[Brief description of the drawings]

FIG. 1 is a side view of a nail polish brush according to the present invention.

FIG. 2 is a side view of the nail polish device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Brush, 2 ... tuft, 3 ... Bristle, 4 ... Stick, 5 ... Sleeve

Continuation of front page (56) References JP-A-6-14812 (JP, A) JP-A-5-123217 (JP, A) US Patent 4,126,144 (US, A) US Patent 5,354,339 (US, A) (58) Field surveyed (Int.Cl. ⁷ , DB name) A45D 33/00-40/30 A45D 8/00-8/40 504 A45D 24/00-31/00 A45D 42/00-44/22 A46B 1/00 -17/08 A46D 1/00-9/06 B29D 9/00 B32B 1/00-35/00 D06M 13/00-15/72 D01F 1/00-6/96 D01F 9/00-9/04 EPAT ( QUESTEL) WPI / L (QUESTEL)

Claims (16)

(57) [Claims] 1. A brush for applying a makeup or beauty product comprising a tuft (2) of bristles (3) fixed at one end to a free end (4a) of a bar (4), the tuft ( 2)
Is a partially acetylated polyvinyl alcohol containing at least units of formulas (I) and (II): [Wherein the unit of the formula (II) is 3 mol based on the polymer.
% Of the polyvinyl alcohol having a weight average molecular weight in the range of 10,000 to 190,000]. 2. Polyvinyl alcohol having a molecular weight of 10,000 to 120,000, preferably 31,000 to 50,000.
The brush of claim 1 having a weight average molecular weight in the range: 3. The unit of the formula (II) is 10 to 15 mol.
2. The composition according to claim 1, wherein said compound is present in a proportion in the range of%.
Or the brush according to 2. 4. The method according to claim 1, wherein the polyvinyl alcohol comprises units of the formulas (I) and (II).
The brush according to any one of claims 1 to 3. 5. A nail polish brush comprising the brush according to any one of claims 1 to 4 . 6. A bristle having one end fixed to a free end of a rod .
A method of coating the bristles in tufts (2) of bristles (3) of the brush (1) comprising tufts, at least part of the bristles of the tufts, the portion comprising units of at least formulas (I) and (II) Acetylated polyvinyl alcohol: [Wherein the unit of the formula (II) is 3 mol based on the polymer.
% To 40 mol%, wherein the polyvinyl alcohol has a weight average molecular weight in the range of 10,000 to 190,000].
Then, the tuft of bristles is removed from the composition and dried. 7. Polyvinyl alcohol having a molecular weight of 10,000 to 120,000, preferably 31,000 to 50,000
The method of claim 6 , wherein the weight average molecular weight is in the range of: 8. The unit of the formula (II) is 10 to 15 mol.
7. The composition according to claim 6 , wherein said compound is present in a proportion in the range of%.
Or the method of 7 . 9. Polyvinyl alcohol is present in the composition in an amount ranging from 0.1 to 10% by weight, preferably from 0.5 to 5% by weight, based on the total weight of the composition. A method according to any one of claims 6 to 8 . 10. A brush obtainable by the method according to claim 6. Description: 11. A container provided with a stopper (5) and a neck (7) integral with a brush (1) soaked in a nail polish or nail care product (9) contained in the container in a storage position. consisting of: (8), an application device of the nail varnish or nail care product (6), wherein the product comprises an aqueous medium, and to brush claims 1 5
An application device according to any one of claims 10 and 10 . 12. A container provided with a stopper (5) and a neck (7) integral with a brush (1) soaked in a nail polish or nail care product (9) contained in the container in a storage position. An apparatus (6) for applying a nail polish or nail care product comprising (8), wherein said product comprises at least one partially acetylated polyvinyl containing at least units of the formulas (I) and (II) Alcohol: [Wherein the unit of the formula (II) is 3 mol based on the polymer.
% Of the polyvinyl alcohol has a weight average molecular weight in the range of 10,000 to 19,000]. 13. The method according to claim 13, wherein the polyvinyl alcohol is 10,000.
To 120,000, preferably 31,000 to 5000
Characterized by having a weight average molecular weight in the range of 0,
An apparatus according to claim 12 . 14. The device according to claim 12 , wherein the units of the formula (II) are present in a proportion ranging from 10 to 15 mol% relative to the polymer. 15. The method according to claim 15, wherein the polyvinyl alcohol comprises units of the formulas (I) and (II).
An apparatus according to any one of claims 12 to 14 . 16. Polyvinyl alcohol, characterized in that present in an amount ranging from 0.005 to 0.5% by weight relative to the total weight of the product in the product, to claim 1-12
The device according to any one of claims 5 to 10.